I think you're referring to the fossilized rigidity I intended to reject in my last two sentences. A rigid pay scale is merely common in US unionism, not required.
Also, be careful not to confuse talent with performance. A slacker with amazing talent can still underperform whoever works diligently to improve and apply their skills.
As with other situations such as the insistence on face-time rather than embracing remote work, "unions are bad" is a truism in the tech industry, and a weird selective attitude towards disruption. Can't we build a better union? Why can't traditional labor dynamics be disrupted, in a way that benefits workers? The rise of the sharing economy proves that the opposite is possible.
Also, be careful not to confuse talent with performance. A slacker with amazing talent can still underperform whoever works diligently to improve and apply their skills.